Heat radiation sheet and method of manufacturing same

a technology of heat radiation sheet and heat radiation sheet, which is applied in the direction of chemistry apparatus and processes, light and heating equipment, and synthetic resin layered products, etc., can solve the problems of reducing the reliability of electronic equipment, and reducing the lifetime of electronic equipment, so as to enhance the heat radiation performance and enhance the blanking performan

Active Publication Date: 2020-12-31
AMOGREENTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The nano-web heat radiation sheet is thin, improves blanking precision, and effectively dissipates heat, preventing equipment failure and enhancing thermal performance for thin electronic devices.

Problems solved by technology

Typically, electronic equipment such as computers, portable personal terminals, or communicator devices have serious concerns for residual image problems and an intrinsic system stability when excessive thermal energy generated from the inside of the electronic equipment is not be diffused to the outside thereof.
This thermal energy may reduce the lifetime of the electronic equipment, or cause failure and malfunction of the electronic equipment, and in severe cases, may provide a cause of explosion or fire.
However, since the conventional heat radiation sheet uses an adhesive foam sheet attached on a surface of a metal plate, the conventional heat radiation sheet becomes thick, to thus cause a problem of making it difficult to use the conventional heat radiation sheet in thin electronic equipment such as portable electronic equipment.
However, since a foam sheet has adhesiveness, it is difficult to blank the heat radiation sheet precisely during blanking the conventional heat radiation sheet.

Method used

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  • Heat radiation sheet and method of manufacturing same
  • Heat radiation sheet and method of manufacturing same

Examples

Experimental program
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Effect test

first embodiment

[0021]Referring to FIGS. 1 and 2, the heat radiation sheet includes: a heat radiation layer 10 that is formed in a nano-web by an electrospinning method in which a heat conductive material is contained in the heat radiation layer 10, to thus have thermal conductivity; and an adhesive layer 20 that is laminated on one surface or both surfaces of the heat radiation layer 10.

[0022]The heat radiation layer 10 is formed by the following steps of: mixing a polymer material that can be electrospun and a solvent, or the polymer material, a heat conductive material, and the solvent at a constant mixture rate, to thus produce a spinning solution; electrospinning the spinning solution to thus form nanofibers 14; and accumulating the nanofibers 14 to thus form a nano-web having a plurality of pores 12. Here, the term “nano-web” can be called the ‘web’ for short.

[0023]Here, the spinning method that is applied to the present invention can employ any one selected from general electrospinning, air...

second embodiment

[0040]FIG. 3 is a cross-sectional view of a heat radiation sheet according to the present invention.

[0041]Referring to FIG. 3, the heat radiation sheet according to the second embodiment includes a substrate 30 that is formed in a nano-web shape by the electrospinning method, an adhesive layer 40 that is laminated on one surface of the substrate 30, and a metal layer 50 that is coated on the other surface of the substrate 30 and having thermal conductivity.

[0042]The substrate 30 is formed by the following steps of: mixing a polymer material and a solvent at a constant rate to thus produce a spinning solution having a viscosity so as to be electrospun; electrospinning the spinning solution to thus form nanofibers; and accumulating the nanofibers to thereby form the substrate 30 having a number of pores in a nano-web form.

[0043]Further, the substrate 30 may be formed in the same structure as the heat radiation layer 10 according to the first embodiment. That is, the substrate 30 may b...

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Abstract

Provided is a method of manufacturing a heat radiation sheet. The method includes the steps of: electrospinning a first spinning solution comprising an adhesive, first heat conductive particles, and a first solvent to form an adhesive layer in a form of a nano-web having a plurality of pores; mixing second heat conductive particles and a second solvent to obtain a second spinning solution; electrospinning the second spinning solution onto the adhesive layer to form an intermediate layer; mixing a polymer material, a third solvent, and third heat conductive particles to obtain a third spinning solution; and electrospinning the third spinning solution onto the intermediate layer to form a heat radiation layer in a form of a web on the intermediate layer.

Description

TECHNICAL FIELD[0001]The present invention relates to a heat radiation sheet that is mounted in an electronic device, to thereby radiate heat generated from the inside of the electronic device to the outside of the electronic device, and more particularly, to a heat radiation sheet that is made in the form of a nano-web form by way of an electrospinning method, and a method of manufacturing same.BACKGROUND ART[0002]Typically, electronic equipment such as computers, portable personal terminals, or communicator devices have serious concerns for residual image problems and an intrinsic system stability when excessive thermal energy generated from the inside of the electronic equipment is not be diffused to the outside thereof. This thermal energy may reduce the lifetime of the electronic equipment, or cause failure and malfunction of the electronic equipment, and in severe cases, may provide a cause of explosion or fire.[0003]In particular, since the current electronic equipment gets s...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): H01L23/373D01D5/00D01F1/10
CPCD01F1/10H01L2924/0002H01L23/3733F28F2255/06H01L23/3737D01D5/003B32B5/24B32B7/12B32B27/06B32B27/12B32B37/02H01L2924/00D04H1/728D04H1/413D04H1/4374D06M11/83
InventorLEE, SEUNG HOONJUNG, YONG SIKSO, YUN MI
OwnerAMOGREENTECH CO LTD